Iridolenticular Contact Decreases Following Laser Iridotomy for Pigment Dispersion Syndrome

OBJECTIVE To evaluate changes in anterior segment anatomy after laser iridotomy for pigment dispersion syndrome. METHODS Ultrasound biomicroscopy was performed on 7 eyes of 7 untreated patients with reverse pupillary block and pigment dispersion syndrome. A radially oriented image with the probe perpendicular to the eye in the superior meridian was obtained before and at least 1 week after laser iridotomy in each eye. We assessed changes in angle recess area and iris-lens contact distance. RESULTS Mean ± SD patient age was 31.3 ± 5.7 years and mean±SD refractive error was −5.0 ± 3.9 diopters. Angle recess area (mean±SD, 0.78 ± 0.28 vs 0.35 ± 0.11 mm2; P=.001, paired t test) and iris-lens contact distance (2.05 ± 0.28 vs 0.79 ± 0.13 mm; P